Home / 128,144.45-192,235.07-39,405.44

Finding the Fourth Proportional to 128,144.45, 192,235.07 and 39,405.44

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Solution

The fourth proportional to 128,144.45, 192,235.07 and 39,405.44 is: 59,113.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,144.45 : 192,235.07 = 39,405.44 : x
  2. Step 2: Convert to fraction form
    128,144.45/192,235.07 = 39,405.44/x
  3. Step 3: Cross multiply
    128,144.45x = 192,235.07 × 39,405.44
  4. Step 4: Simplify right side
    128,144.45x = 7,575,108,095.88
  5. Step 5: Solve for x
    x = 7,575,108,095.88/128,144.45
  6. Step 6: Final answer
    x = 59,113.82

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.